Funny, I was just looking at this. The problem is with lib too (WINBIND, pam_*, libsmbclient.so, libmsrpc.so. I submitted a patch for 3379 (WINBIND_NSS), but this needs more sprucing.
Would it make sense to just have bin/sbin/lib be ".old" versioned and lump several install stanzas together in Makefine.in? The I could rework 3379 as well.